MEXICO CITY (AP) — The leaders of the three NAFTA nations met Wednesday in Mexico in part to highlight the economic cooperation that has grown since NAFTA joined the United States, Canada and Mexico 20 years ago. But all eyes, including Eugenio Madero’s, were on one key area that NAFTA didn’t touch: energy.

For Madero and plant owners across Mexico, the more near-term impact could be cheaper electricity.